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26
docs/VictoriaLogs/keyConcepts.md
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@ -17,7 +17,7 @@ aliases:
[VictoriaLogs](https://docs.victoriametrics.com/victorialogs/) works with both structured and unstructured logs.
Every log entry must contain at least [log message field](#message-field) plus arbitrary number of additional `key=value` fields.
A single log entry can be expressed as a single-level [JSON](https://www.json.org/json-en.html) object with string keys and values.
A single log entry can be expressed as a single-level [JSON](https://www.json.org/json-en.html) object with string keys and string values.
For example:
```json
@ -31,6 +31,30 @@ For example:
}
```
Empty values are treated the same as non-existing values. For example, the following log entries are equivalent,
since they have only one identical non-empty field - [`_msg`](#message-field):
```json
{
"_msg": "foo bar",
"some_field": "",
"another_field": ""
}
```
```json
{
"_msg": "foo bar",
"third_field": "",
}
```
```json
{
"_msg": "foo bar",
}
```
VictoriaLogs automatically transforms multi-level JSON (aka nested JSON) into single-level JSON
during [data ingestion](https://docs.victoriametrics.com/victorialogs/data-ingestion/) according to the following rules: